Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '518f7e0efaeceee48a8128ced632e1ad2f6e7e52e4c792a68c5baddfb71d9518' 
  AND token = 'gLz4m9KvgJYVmF74TuU/s7FWiFQGXVrR40U5caMGxEQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}